北桥散热炮 發表於 2020-11-30 11:03:00

Linux修改服务器用户最大进程数、最大打开文件数

<h2>一、Linux修改服务器用户最大进程数、最大打开文件数</h2>
<p>修改linux 打开最大文件数<br>echo "" &gt;&gt; /etc/security/limits.conf<br>echo "*        soft   nproc          65535" &gt;&gt;/etc/security/limits.conf<br>echo "*        hard   nproc          65535" &gt;&gt;/etc/security/limits.conf<br>echo "*        soft   nofile         65535" &gt;&gt;/etc/security/limits.conf<br>echo "* hard   nofile         65535" &gt;&gt;/etc/security/limits.conf<br>echo "" &gt;&gt; /etc/profile<br>echo "ulimit -n65535" &gt;&gt; /etc/profile<br>echo "ulimit -u65535" &gt;&gt; /etc/profile</p>
<p>最大进程数<br>vi /etc/security/limits.d/90-nproc.conf<br>* soft nproc 65535</p>
<div>
<p>&nbsp;</p>
<h2>二、这些个值是怎么来的?</h2>
<p>root 账号下 ulimit -u 出现的max user processes 的值默认是&nbsp;# cat /proc/sys/kernel/threads-max的值/2,即系统线程数的一半</p>
<p>普通账号下 ulimit -u &nbsp;出现的max user processes的值 默认是&nbsp;/etc/security/limits.d/20-nproc.conf(centos6 是90-nproc.conf) &nbsp; 文件中的</p>
<p><img 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" alt=""></p>
<h2>三、系统总限制</h2>
<p>其实上面的 max user processes &nbsp;65535 的值也只是表象,普通用户最大进程数无法达到65535 ,因为用户的max &nbsp;user processes的值,最后是受全局的kernel.pid_max的值限制。也就是说kernel.pid_max=1024 &nbsp;,那么你用户的max user processes的值是127426 ,用户能打开的最大进程数还是1024。</p>
</div>
<div>
<div><strong>查看全局的pid_max方法:</strong></div>
<div>方法一:</div>
<div>
<div>cat&nbsp;/proc/sys/kernel/pid_max</div>
<div>方法二:</div>
</div>
</div>
<div>
<div># sysctl kernel.pid_max</div>
<div>kernel.pid_max = 32768</div>
<p><strong>修改这个值方法:</strong></p>
<div>
<div>echo 65535 &gt; /proc/sys/kernel/pid_max</div>
<div>所以以上都操作完成后,才算是正确修改了max user processes 的值</div>
<div>&nbsp;</div>
<div>上面只是临时生效,重启机器后会失效</div>
<div><strong>永久生效方法:</strong></div>
<div>在/etc/sysctl.conf中添加kernel.pid_max = 65535</div>
<div># vim /etc/sysctl.conf</div>
<div>kernel.pid_max = 65535</div>
<div>或者:</div>
<div>echo "kernel.pid_max = 65535" &gt;&gt; /etc/sysctl.conf</div>
<div>然后重启机器。</div>
<div>&nbsp;</div>
<div>参考</div>
<div>
<p>Linux 最大进程数 - unixfbi.com - 博客园<br>https://www.cnblogs.com/pangguoping/p/5792075.html</p>
</div>
</div>
</div><br><br>
来源:https://www.cnblogs.com/paul8339/p/14060159.html
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